Can a USB print router like the one in the link below be used to connect the modem (or is it exclusively for a printer) and connect the router from the link to a wireless router so it can be shared across the network.
http://www.sybaritic.co.za/store/product_info.php?cPath=100_172&products_id=14621
http://www.sybaritic.co.za/store/product_info.php?cPath=100_172&products_id=14621